/*
*    Qizx/open 3.0 beta
*
* This code is the open-source version of Qizx.
* Copyright (C) 2004-2009 Axyana Software -- All rights reserved.
*
* The contents of this file are subject to the Mozilla Public License 
*  Version 1.1 (the "License"); you may not use this file except in 
*  compliance with the License. You may obtain a copy of the License at
*  http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
*  WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
*  for the specific language governing rights and limitations under the
*  License.
*
* The Initial Developer of the Original Code is Xavier Franc - Axyana Software.
*
*/
using System;
using EvaluationException = System.Qizx.Api.EvaluationException;
using DateTimeException = System.Qizx.Api.Util.XQDateTimeException;
using GYear = System.Qizx.Api.Util.GYear;
using EvalContext = System.Qizx.XQuery.EvalContext;
using XQItem = System.Qizx.XQuery.XQItem;
using XQItemType = System.Qizx.XQuery.XQItemType;
using XQType = System.Qizx.XQuery.XQType;
using XQValue = System.Qizx.XQuery.XQValue;
namespace System.Qizx.XQuery.Dt
{
	
	public class GYearType:MomentType
	{
		public override string ShortName
		{
			get
			{
				return "gYear";
			}
			
		}
		
		public override XQValue cast(XQItem value_Renamed, EvalContext context)
		{
			XQItemType type = value_Renamed.ItemType;
			GYear result = null;
			try
			{
				if (type is StringType)
					result = GYear.parseGYear(value_Renamed.ValueAsString.Trim());
				else if (XQType.INTEGER.IsSuperType(type) && !context.sObs())
					result = new GYear((int) value_Renamed.ValueAsInteger, 0, 0, 0);
				else if (type == XQType.G_YEAR || type == XQType.DATE || type == XQType.DATE_TIME)
					result = new GYear(value_Renamed.ValueAsMoment);
				else
					invalidCast(type);
			}
			catch (DateTimeException e)
			{
				castException(e);
			}
			
			return new SingleMoment(result, XQType.G_YEAR);
		}
	}
}